All I get from this hemming and hawing is that you are having difficulty setting a healthy personal boundary. If you have trouble setting a boundary, you sure as heck aren't enforcing it.
It is not even healthy for you to be friends. Can you be civil? Yes. You don't have to be an @ss.
Can you be friends? Not healthy.
If she wants a divorce so that she can move on, how is 'being friends' going to help that happen? It isn't. Give her what she wants, and free yourself to have a healthy, productive life in the process.
Eh. When we are separate it will be much easier to set and keep boundaries once I figure out what I want to do. I don't think I want to be friends with her, certainly not for me, but I am worried about her.
As of right now in our current situation, I guess I'll have to wing it. Should I not be there for here when she wants to tell me about something? Usually, it involves something she wants to share, or something she needs support with.